i play. Baby Girls' Ultimate Snap Ruffle Swim Diaper Polyester Machine washable. This all-in-one swimsuit/diaper helps contain accidents IN AND OUT of the pool. This swim diaper has an innovative design so it can be worn alone. Iplay's ultimate swim diapers hold in liquid and urine so they can be worn to the pool and in the car. Diapers snap down the side for quick changing. Waterproof outer layer, super absorbent inner layer and wick-away lining next to baby's skin Snug-fitting around legs and waist. No other diapers necessary.